DESCRIPTION
The LTC®5599 is a direct conversion I/Q modulator designed for low power wireless applications that enable direct modulation of differential baseband I and Q signals onanRFcarrier. Singleside-bandmodulationorside-band suppressed upconversion can be achieved by applying 90° phase-shifted signals to the I and Q inputs. The I/Q baseband input ports can be either AC or DC coupled to a source with a common mode voltage level of about 1.4V.

FEATURES
■ Frequency Range: 30MHz to 1300MHz
■ Low Power: 2.7V to 3.6V Supply; 28mA
■ Low LO Carrier Leakage: –51.5dBm at 500MHz
■ Side-Band Suppression: –52.6dBc at 500MHz
■ Output IP3: 20.8dBm at 500MHz
■ Low RF Output Noise Floor: –156dBm/Hz at 6MHz
   Offset, PRF = 3dBm
■ Sine Wave or Square Wave LO Drive
■ SPI Control:
   Adjustable Gain: –19dB to 0dB in 1dB Steps
   Effecting Supply Current from 8mA to 35mA
   I/Q Offset Adjust: –65dBm LO Carrier Leakage
   I/Q Gain/Phase Adjust: –60dBc Side-Band Suppressed
■ 24-Lead QFN 4mm × 4mm Package

APPLICATIONS
■ Wireless Microphones
■ Battery Powered Radios
■ Ad-Hoc Wireless Infrastructure Networks
■ “White-Space” Transmitters
■ Software Defined Radios (SDR)
■ Military Radios